Extends the A.6 supervisor with an OS-level connectivity hint so a
returning network triggers a redial immediately instead of waiting
out the current backoff slot (up to 60 s). The watchdog remains the
authoritative loss detector — the OS signal is advisory.
* `chanora_core::NetworkState` (Unknown / Online / Offline) is owned
by `ChanoraSession` via a `tokio::sync::watch::Sender`.
`set_network_state()` / `network_state()` are the public accessors.
* The supervisor's watch-phase `select!` gains a `network_rx`
branch: Offline pre-charges watchdog misses (capped at
`MAX_MISSES - 1`) so the next probe failure trips immediately;
Online clears stale misses. This shrinks UI-banner latency on a
Wi-Fi drop from ~15 s to ~5 s.
* The reconnect-loop's backoff sleep races against Online: a
transition cuts the sleep short and resets the attempt counter so
future losses start at the smallest backoff window again.
* `chanora_bridge` adds `BridgeNetworkState` (mirror enum) and a
sync `set_network_state(state)` function. On platforms with no
signal wired the supervisor stays at Unknown and falls back to
pure watchdog/backoff — no behavioural regression vs A.6.
* Flutter adds `connectivity_plus ^6.1.0` and wires
`_wireConnectivity()` in `main()`: seeds with `checkConnectivity()`
then forwards every `onConnectivityChanged` to the bridge,
mapping any non-`none` transport to Online.
Verified on Moto G Stylus 5G (Android 14): `svc wifi disable && svc
data disable` for ~40 s — reconnect banner appeared promptly
because the watchdog was pre-charged. After `svc wifi enable && svc
data enable` the supervisor woke from its 15 s backoff slot and
reconnected within seconds; the channel tree re-rendered without
user action.
EdisonJwa
f52d702e27